Royaltec RBT2110 Features / Specifications: SiRF Star III GPS Chipset. Twenty (20) Parallel Channels. NMEA0183 Compliant Protocol. Extreme fast TTFF at low signal level. High sensitivity acquisition Power saving features. Industrial Standard. Rechargeable and replaceable Lithium-ion battery. More than 17hrs of continual operating time. SBAS (WAAS / EGNOS). GPS Chipset: SiRF Star III. Frequency: L1, 1575.42MHz Channels: 20 Channels all-in-view tracking. DGPS Source: SBAS (WAAS, EGNOS). Power: Built-in rechargeable battery and DC input charging protection circuit. Antenna Type: Built-in Antenna (External Antenna Optional) Acquisition Time: Reacquisition: 0.1 Seconds (Average). Hot Start: 1 Second (Average). Warm Start: 35 Second Start (Average). Cold Start: 42 Second (Average). Accuracy: Tracking Sensitivity: -159dBM. Position: 10 metres RMS without SA. Velocity: 0.1 metres/Second without SA. Time: 1 microsecond synchronised to GPS Time. Dynamic Conditions: Altitude: <18,000 metres. Velocity: <515 metres/second. Environmental: Operating Temperature: -10ºC to +60ºC. Storage Temperature: -20ºC to +75ºC. Physical: Dimension: 70x41x25mm. Weight: 62g